Hymenoptera aculeata collected in Algeria: the Sphegidae. 97 
hill, carrying off an Achetid from a stony slope.” 22. in, 
Sanya) Kp Et 
a2 @ Paskra, 18.4, and 15) 1, 955 12. iv, 97. A. 
2¢ f, 19. Biskra, 4-20. v, 98. F. D. M. 
299. Alger, 19. and 21. iv, 98. F. D. M. 
NOTOGONIA POMPILIFORMIS, Pz 
ie, 1 9. Biskra, on Ammi visnaga, 18. and 23. v, 93. 
EK. E. 
1 9. Biskra, on Moricandia arvensis, 10. 11,97. <A. E. E. 
Lt ate Biskra, 30. ii, and 22. iv, 97. A. E. E. 
if : Bone, 30. vii, OF; Ay Ee. 
17,1 @ Biskra, 12. and 14, v, 98. F. D. M: 
209. Alcer, 16. ii and 12..iv, 98. F.D, M. 
NoToGONIA SCULPTURATA, Kohl 
5 99. Alger, 16. 11i-4, iv, 98. F. D. M. 
1 f. Biskra, 16. v, 98. F. D. M. 
NOTOGONIA OPALIPENNIS, Kohl 
1 9. Biskra, on Ammi visnaga, 24. v, 97. A. E. E. 
TACHYTES SUPERBIENS, 0. sp. 
This is by far the largest Palaearctic Tachytes known to 
me. In size and general appearance it agrees with 7’ 
monetaria, Smith, an Indian species. But on comparing 
it with the “type” of the latter at South Kensington (a 
9) I find that monetaria has the eyes further apart on the 
vertex, differently-clouded wings (darkest in the costal 
region and near the stigma and with only a small area 
slightly infuscated near the apex, while swperbiens has 
them perfectly hyaline except at the apex, where a very 
broad and dark band runs along the margin), very ditfer- 
ent pilosity on the thorax (simple erect griseous hairs all 
over it), and a differently-coloured abdomen (the base 
being black, while in swperbiens it is entirely testaceous). 
Nor is it veloc, Smith, with whose “type” I have also 
compared it. It is far larger, and altogether different in 
colour and general appearance. It seems almost incred- 
ible that so magnificent a Palaearctic species should not 
have been long ago detected and described; and this is 
probably the reason that Mr. Saunders, though marking it 
as a “new species” in his list, has apparently neither 
TRANS. ENT. SOC. LOND. 1911.—PART I. (MAY) H 
